/*
 * Copyright 2014 Toxic Bakery
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *       http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

package com.example.zhpan.banner.transform;

import android.view.View;

public class DepthPageTransformer extends BaseTransformer {

  private static final float MIN_SCALE = 0.75f;

  @Override
  protected void onTransform(View view, float position) {
    if (position <= 0f) {
      view.setTranslationX(0f);
      view.setScaleX(1f);
      view.setScaleY(1f);
    } else if (position <= 1f) {
      final float scaleFactor = MIN_SCALE + (1 - MIN_SCALE) * (1 - Math.abs(position));
      view.setAlpha(1 - position);
      view.setPivotY(0.5f * view.getHeight());
      view.setTranslationX(view.getWidth() * -position);
      view.setScaleX(scaleFactor);
      view.setScaleY(scaleFactor);
    }
  }

  @Override
  protected boolean isPagingEnabled() {
    return true;
  }
}
